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Martin P.N. Gent, Wade H. Elmer, Kranti Macherla, and Richard J. McAvoy

, up to 75% of the water and fertilizer applied by overhead irrigation may be lost through evaporation, runoff, or leached from potted plants ( Yelanich and Beirnbaum, 1994 ). Drippers can deliver water directly to the top surface of the root medium

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Xing-Zheng Fu, Fei Xing, Li Cao, Chang-Pin Chun, Li-Li Ling, Cai-Lun Jiang, and Liang-Zhi Peng

application of Zn fertilizer has almost completely replaced soil application. The positive effects of Zn sprays on nutrient status, yield, and fruit quality have been observed in mandarin ( Razzaq et al., 2013 ; Srivastava and Singh, 2009 ), orange ( Boaretto

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Robert D. Wright, Brian E. Jackson, Jake F. Browder, and Joyce G. Latimer

space) as a commercial PL substrate ( Saunders et al., 2006 ). However, Wright and Browder (2005) demonstrated that additional fertilizer applications were required for PTS to maximize plant growth compared with a pine bark substrate. Gruda and

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Kayla R. Sanders and Jeffrey S. Beasley

As one of the most intensely managed crops ( King, 2001 ), turfgrass used for aesthetics or recreation requires routine fertilizer applications ( Rice and Horgan, 2011 ; Schwartz and Shuman, 2005 ) to maintain acceptable quality. However

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Carey Grable, Joshua Knight, and Dewayne L. Ingram

Proper plant nutrition remains one of the most important topics for growers of nursery container stock. While some substrates have a starter charge of fertilizer incorporated, the pine ( Pinus sp.) bark-based substrates commonly used by nursery

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Peter Alem, Paul A. Thomas, and Marc W. van Iersel

Fertilizer and irrigation are inseparable components of ornamental plant production. Nutrient availability to the roots is dependent on θ, because nutrient movement is driven by mass flow and diffusion ( Nye and Tinker, 1977 ). Greenhouse crops are

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Laura L. Van Eerd and Kelsey A. O'Reilly

Nitrogen is a critical nutrient for crop production, but it is difficult to optimize nitrogen (N) fertilizer applications because of the dynamic nature of plant-available N over the growing season. Nitrogen availability affects yield and quality of

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Javier Fernandez-Salvador, Bernadine C. Strik, and David R. Bryla

interested in targeting higher-value niche markets [ Organic Trade Association (OTA), 2013 ]. Guidelines for fertilizer and nutrient management in organic blackberry production are presently limited to overarching recommendations for nitrogen application

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Arnold W. Schumann

achieve this objective are 1) the collection of spatial data from pre-existing conditions in the field (e.g., remote sensing, canopy size, or yield measurement), 2) the application of precise fertilizer amounts to the crop when and where needed, and 3) the

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John M. Smagula and Ilse Fastook

Acommercial lowbush blueberry field with a history of N and P deficiency was used to study the response to several organic fertilizers. Diammonium phosphate (DAP) is the standard fertilizer for correcting N and P deficiencyin non-organic production. At a rate of 67 kg N/ha Rennaisance (8–2–6), Pro-Holly (4–6–4), Pro Grow (5–3–4), Nutri-Wave (4–1–2), or DAP (18–46–0) was applied preemergent to 1.8 × 15 m treatment plots. An unfertilized plot served as the control. Leaf N and P were deficient in the controls. DAP and Pro-Holly raised leaf N to satisfactory levels (1.6%). Only DAP raised leaf P concentrations (0.144%), compared to controls (0.122%). Leaf K was not deficient but was raised by Pro-Holly. Pro-Holly and DAP were equally effective in increasing stem height, branching, branch length, flower bud formation, and yield. Pro-Holly could effectively substitute for DAP in organic wild blueberry production.